Shuttle



I. SNOW.

SHUTTLE.

APPLICATION FILED APR. 17, 1919.

Patented Apr. 19, 1921.

12 INVENTOR. l %a/c Ply/M A TTORNE Y.

PATENT OFFICE.

ISAAC SNOW, OF LAWRENCE, MASSACHUSETTS.

SHUTTLE.

Specification of Letters Patent.

Application filed. April 17, 1919.- Serial No. 290,821.

T 0 all whom it may concern: Be it known that I, ISAAC SNOW, a c1t1- zenof the United States, residing at Lawrence, in the county of Essex andState of Massachusetts, have invented certain new and usefulImprovements in Shuttles, of which the following is a specification.

My invention relates to an improvement in shuttles, more particularly ofthe selfthreading type for weft replenishing looms.

The object of my invention is to provide a threading guide of simpleconstruction that can readily be located in a threading chamber, one inwhich the operation of self threading may be performed with certaintyand one in which, when threaded, dethreading will be impossible or veryimprobable.

()ther purposes of my invention are to reduce the likelihood ofballooning by the thread and the elimination of all points, beaks, orother projecting parts in any position where a loop of the thread cancatch or loop around them.

For convenience and for the purpose of identification in thisspecification, I will call the front, that end of the shuttle where theeye is located, and the other end of the shuttle the back.

I will call an eye which passes out of the left side when looking at thefront point, a left eye, and an eye on the opposite side, a right eye.

In all the figures of the drawings except Figure 10, I show a shuttlewith a left eye, and in all the figures the yarn on the bobbin issupposed to be wound in the usual way, shown in F 1, that is, from leftto right it goes over, thence down under from right to left.

I will call the top of the shuttle as it runs in a loom as the top side,and the bottom as the bottom side.

In the drawings, Fig. 1 isa plan view of the front end of a shuttle witha metal threading block to which it is attached, and

in which is embodied my device. Fig. 2 is an elevation from the left ofFig. 1. Fig. 3 is a view similar to Fig. 2 of a threading blockincluding my device, the shuttle being indicated by dotted lines. Fig. 4is a section on line 44 of Fig. 1 looking from the left, that is, in thedirection of the arrows. Fig. 5 is a front elevation of a. shuttle withmy device attached. Fig. 6 is a side elevation of a threading block,including my device, from the side opposite to that shown in of theshuttle.

Patented Apr. 19, 1921. I

Fig. 3. Fig. 7 is a front elevation, and Fig.

8 a rear elevationof Fig. 6. Fig. 9 is a section from the top on line9-9 in Fig. 7. Fig. 10 is a front perspective view of my device embodiedin what might be called a sheet metal threading block, of somewhatmodified form from that shown in Figs. 1 to 9. Fig. 11 is a plan view ofthe front of a shuttle with my guide plate attached directly to the woodof the shuttle, the usual form of threading block being omitted. Fig. 12is a sectional elevation from the front in the direction of the arrow online 12-l2 of Fi 11.

is a shuttle having the usual bobbin chamber 10 for the bobbin B fromwhich the yarn or thread .A is unwound. 12 is the threading chamberwhich extends forward in continuation of bobbin chamber 10, and 13 isthe delivery passage which extends still farther forward from thethreading chamber. H represents the shuttle eye in the wood, and thisconnects with the threading chamber 12 through theslot 15 and the slot14 cut away from the delivery passage 13. The usual bearing pins 17, 17are shown.

My invention consists essentially of the thread directing guide plate Gwhich, in

Figs. 1 to 9, is shown as attached to, by being set into, a threadingblock F.

I find a convenient method of applyin my guide plate is to a threadingblock, suc 1 as F, which has at the front end a horn 32, at the bottom aprojection 34 which sets into a recess in the wood of the shuttle in awell known manner, and a hole 35 for the retaining bolt or screw 36.

This thread directing guide plate G has a nose 19 which extends forwardof the shuttle eye outlet H, and at 22 slopes down and back from thenose through the threading chamber 12. This side 22 slopes down and outtoward the side of the shuttle from the top part shown at 21, preferablyfrom the side of the eye in the same direction and proximate the normalunwinding path of the yarn as it unwinds on the first pick of theshuttle in a magazine loom.

This top part, which is shown as bent over to form a top rim 20 to fitinto a suitable groove 37, extends lengthwise of the top 30 of threadingblock F whereby it is attached to block F which may be considered aspart Preferably, this rim 20 is brazed or soldered into the groove 37.

Near its back, bottom edge 26 of guide plate G is bent under, forming athread retaining guide hook 24 which is preferably of involute form andextends up at a point back of the shuttle eye and proximate to thebobbin chamber. It is preferably of such length as to overlap guideplate G and preferably is cut away at the back so as to rake forward.

Directly in front of this hook 2-1 is an open space 25 which maycontinue out to the nose 19, but I prefer to bend over the bottom edgeof the guide plate to form a hooked rim 27 which extends under thesloping forward part of the thread directing guide to a point in frontof the shuttle eye and preferably up to the nose 19. .This is preferablycut away at the front and back to rake forward and back.

The threading block F is partly of a well known form, being of somewhattriangular shape, and has a forward edge 31, which becomes part of thehead or extension from horn 32 of well known type. Preferably the metalat 6 extends forward curving down in side slope 22 as shown in Figs. 1,5 and 7. I also show a thread pin 33 around which the thread A passeswhen the shuttle is correctly threaded.

I prefer that my involute thread retaining hook guide 241 should be socut away from the rear that it will rake forward, as clearly shown inFig. 4, and will taper either to a blunt or sharp point, and I preferthat my trapping rim 27 should be cut away at its front and back, bothfor the purpose of causing loops formed by the .ballooning or throwingof the yarn to clear themselves.

In the operation of my device, the thread A is held in a magazine loombeyond the front end 8 of a shuttle, and as the shuttle recedes thethread or yarn rapidly unwinds from the bobbin B, traveling in a pathwhich may be likened to a cone which bellies to some extent. The yarnflying over the sloping side of my guide plate naturally follows it andslips down under and into the thread trapping rim 27, if,such is used.As it is now caught in the nose or mouth at the front of rim 27, theapex of its cone of revolution is brought nearer to involute hook 24,and the thread is trapped, so to speak, and slips more easily over suchhook.

This mouth 101 of rim 27 controls the ballooning or bellying of thethread, and also holds it up under the top of the guide plate so that,,when the shuttle stops, any loop formed by the slackening of the threaddrops down into the delivery passage 13 or rooves l4: and 15 where itcan do no harm.

uch holding up, in fact, helps it to drop into the grooves 14 and 15 onthe second pick when the shuttle is returning and tends to overcome anytendency to go over to the right and unthread.

By making my guide plate (1: of trumpet shape with the top edge'oftrapping rim 27 above nose guard v6, and by making the curl of rim 27andmouth 101 small, the ballooning of the thread is limited and itstendency to throw or loop is greatly reduced.

Generally, during the first pick, the thread runs through the guide hook24L and trapping rim 27, while on the second pick it slips over thecut-away front edge of rim 27 and passing through the open part 25 ofthe bottom edge of guide plate G, it runs out through the shuttle eye Haround the friction pins If, on account of ballooning or for any othercause, thethread slips out of the eye H and back through the passages 14and 15, it will ordinarily be trapped by the rim 27,

but if it escapes, it will pass out the other way under through the openspace 25, still being held by involute hoolc 24, and on the next throwof the shuttle will rethread.

vVhen, as sometimes happens, the yarn balloons and loops forward overthe nose 19, as shown in Fig. 6, the loop will slip down off the guideplate and the rim 27 onto the hook 24, as shown in Fig. 4, and fromthence will slip off the end, thus clearing itself. To facilitate thisclearing of loops, I prefer to form the rear edge 25 of the threaddirecting guide so as to slope down and forward, as shown in Fig. 6, orI may cut away the nose, as shown at 66 in Fig. 11, or I may do both. Inany event, the edges of the guiding parts should be so cut that anyloops. will naturally clear themselves as the shuttle moves in itsregularcourse.

As shown in the slightly modified form shown in Fig. 3, I may cut the mtal of block F away squarely at 38 behind'horn 32 so that a piece offelt 39 or other suitable material can be introduced as a friction.Preferably, this is pressed in behind the bearing pin 33.

While I prefer to use mydevice on shuttles with a left eye and a bobbinwith the normal winding, as shown in Fig. 10, it can be applied to aright eye and, instead of being attached to a cast or forged threadingblock, the guide plate and block can all be made of sheet metal, asshown at L in Fig. 10.

In Fig. 10, a suitable blank is cut and bent so that the bottom wall 51and side walls 50 and 53 will fit into a suitable threading chamber.Preferably, a blo'ck 52 is interposed to keep side walls 50 and 53 theright distance apart, and the device is held in place as by means of abolt passed through a hole 35.

The guide plate proper is formed by bending over the side wall 50 at 57,and the involute hook 59 is farther bent therefrom at the rear proximatethe bobbin chamber. The front edge 58 is shown as sloping down and backfrom the nose and down and forward from the back 71. The other side 5%is formed at its front as the horn 54, behind which the'thread passesout through a right eye, and is bent over in substantially T shape toform a longitudinal rim 50, and is cut away and bent over and back at 55to register with a thread directing slot or passage, such as 14: or 15.The operation is substantially the same as in the other constructionwith a left eye, the thread block, however, and the trapping rim 27being omitted.

In Figs. 11 and 12, I show a very simple form of my guide plate at M.The shuttle has the slot or passage 15 cut in the wood, as well as thebobbin chamber 10 and the threading chamber 60, together with thedelivery passage 13. The right wall 61 of the threading chamber issubstantially straight, as shown in Fig. 11. The top rim 63 of guardplate M fits into a suitable channel 7 5 in the wood and is shown asheld in position by screws or brads 64. It slopes on the side, it has asnub nose 66 at the front and at the side 65 slopes down and out, andthe edge of this side slopes from the front down and back and, from theback, down and forward at 68. The side 65 is extended to form theinvolute thread retaining hook guide 67, which is shown as raking atcluding guide slopes 22 and the guide hook 24, substantially in the formof a trumpet, the part 25 in front of the hook being cut away preferablyas far as the bottom or a little farther. I also prefer to make the nose19 rounded, as also the front and back of trapping rim, the back edge125 of the guide plate and the back edge of the involute hook 24, allsloping in the direction which the thread is to take in threading.

The front edge of the involute hook is preferably in a plane at rightangles to the axis of the shuttle, or it may hook forward, as shown inFig. 11. If the yarn unthreads, it will run out through the cut-awaypart 25 out around the outside of the sloping part 22 of the guide plateG, in which case it will be effectively held in position, or it willslip back up around the trapping rim 27, where it will also be held inposition.

It is to be understood that my device can be constructed and attached invarious ways. It may be attached to the wood of the shuttle, which hasbeen cut suitably to receive it, or to a metal threading block, whichamounts to the same thing, in any suitable manner.

My device consists essentially of a guide plate, preferably of sheetmetal, attached by means of an attaching rim near the top of the shuttleand extending over at a suitable slope into the threading chamber, inthe direction in which the thread will unwind from the bobbin, suchguide plate raking backward along its front edge from its nose andpreferably forward from its back edge, the sloping side merging into ahook guide preferably of involute form, there being no place for thethread to go except around the slope and into the hook. The mouth of thepassage leading into the hook is the Whole top of the threading chamberand preferably narrows down so that as the thread travels it is guidednaturally and inevitably into the hook. When once in the hook it remainsthere, as the hook guide forms the termination of a continuous slope orcurve from the top side of the threading passage.

Additional features are the trapping rim which rakes forward and back,the forward rake of the back of the guide hook, the trumpet shape of thewhole guide plate with the small mouth of the trapping rim, and the noseguard which projects down so as to be in front of the upper edge of thetrapping rim.

I claim:

1. The combination in a shuttle having an eye, a bobbin chamber, athreading chamber in continuation thereof which connects with the eye,and a delivery passage extending forward from the threading chamber, ofa thread directing guide plate so fixed to the top side of the shuttleas to extend into the threading chamber. such guide plate having a nosewhich extends forward of the eye and having a bottom rim which slopesdown and back from the nose and down and forward from the back throughthe threading chamber and at the side slopes down and out, with aninvolute thread retaining hook guide which extends from and under thethread directing guide plate back of the shuttle eye and proximate thebobbin chamber, such hook being cut away to rake forward and to taper,and a thread trapping rim which extends under the. sloping forward partof the thread directing guide in front of the shuttle eye and is cutaway at its front and back.

2. The combination in a shuttle having an eye, a bobbin chamber, athreading chamber in continuation thereof which connects with the eye,and a delivery passage extending forward from the threading chamber,-ofa thread directing guide plate so fixed to the top side of the shuttleas to extend into the threading chamber, such guide plate having a nosewhich extends forward of the eye and having a bottom rim which slopesdown and back from the nose and down and forward from the back throughthe threading chamber and at the side slopes down and out, with aninvolute thread retaining hook guide which extends from and under thethread directing guide plate back of the shuttle eye and proximate thebobbin chamber, such hook being cut away to rake forward and to taper.

3. The combination in a shuttle having an eye a bobbin chamber, athreading chamber in continuation thereof which connects with the eye,and a delivery passage extending forward from the threading chamber, ofa threading block fixed to the shuttle in the threading chamber, andhaving a longitudinal groove in its top part, a threaddirecting guideplate of sheet metal having an attaching rim at its top edge which setsinto said groove and is so fixed therein that the guide plate extendsinto the threading chamber, such guide plate being of substantiallytrumpet shape, having a nose which extends forward of the eye and havinga bottom rim which slopes down and back from the nose and down andforward from the back through the threading chamber and at the sideslopes down and out, with an involute thread retaining hook guide whichextends from and under the thread directing guide plate back of theshuttle eye and proximate the bobbin chamber, such hook being cut awayto rake forward and to 'taper, and a thread trapping rim which extendsunder the sloping forward part of the thread directing guide in front ofthe shuttle eye and is cut away at its front and back, together with anose guard which extends I down in front of the top edge of the trappingrim.

4:. The combination in a shuttle having an eye, a bobbin chamber, athreading chamber in continuation thereof which connects with the eye,and a delivery passage extending forward from the threading vchamber, ofa thread directing guideplate so fixed to the top side of the shuttle asto extend into the threading chamber, such guide plate having a nosewhich extends forward of the eye and having a bottom rim which slopesdown and back from the nose through the threading chamber and at theside slopes down and out, with an involute thread retaining hook guidewhich extends from and under the thread directing guide plate back ofthe shuttle eye and proximate the bobbin chamber, such hook being cutaway to rake forward and to taper.

5. The combination in a shuttle having an eye, a bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed tothe trap shuttle as toextend into the threading chamber,v such guide plate having a nose whichextends forward of the eye and having a bottom rim which slopes down andback side of the from the nose through the threading chant hook beingcut away to rake forward and to taper.

6. The combination in a shuttle having aneye, a bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of theshuttle as to extend into the threading chamber, such guide plate havinga nose which extends forward of the eye and having a vbottom rim whichslopes down and back from the nose through the threading chamber and atthe side slopes down and out, with an involute thread retaining hookguide which extends from and under the thread directing guide plate backof the shuttle eye and proximate the bobbin chamber.

7. The combination in. a shuttle having an eye, a bobbin chamber, and athreading chamber in continuation thereof which connects with. the eye,of a thread directing guide plate so fixed to the top side of theshuttle as to extend into the'threading chamber, such guide plate havinga bottom rim which slopes down and back through the threading chamberand at the side slopes down and out, with an involute thread retaininghook guide which extends from and under the thread directing guide plateback of the shuttle eye.

8. The combination in a shuttle having an eye, a bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of theshuttle as to extend into the threading chamber, such guide plate havinga bottom rim which slopes down and back through the.

threading chamber and at the side slopes down and out, with a threadretaining hook guide which extends from and under the thread directingguide plate back of the shuttle eye.

9. The combination in a shuttle having an eye, a bobbin chamber and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of the 1shuttle as to extend into the threading chamber, such guide plate havinga thread trapping ri'e which extends from and under its forward part anda thread retaining guide hook which extends from and under its backpart,

10. The combination in a shuttle havingguide plate so fixed to the topside of the shuttle as to extend into the threading chamber, such guideplate having a bottom rim which slopes down and back from the front anddown and forward from the back through the threading chamber and at theside slopes down and out, and a thread trapping rim of hook form whichextends from and under the sloping forward part ofthe thread directingguide. V

11. The combination in a shuttle having an eye, a bobbin chamber,and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of the"shuttle as to extend into the threading chamber, such guide plate havinga bottom rim which slopes down and back from the front and at the sideslopes down and out, and a thread trapping rim of hook form whichextends from and under the sloping forward part of the thread directingguide.

12. The combination in a shuttle having an eye, a bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of theshuttle as to extend into the threading chamber, such guide plate havinga bottom rim which slopes down and back from the front and at the sideslopes down and out, and a thread trapping rim of hook form whichextends from and under theslopin forward part of the thread directinggui e, and is cut away at its front and back.

13. The combination in. a shuttle having an eye, a bobbin chamber, athreading chamber in continuation thereof which connects with the eye,and a delivery passage extending forward from the threading chamber, ofa thread directing. guide plate so fixed to the top side of the shuttleas to extend into the threading chamber, such guide plate havinga nosewhich extends forward of the eye and having a bottom rim which slopesdown and back from the nose and down and forward from the back throughthe thread ing chamber and at .the side slopes down and out, with aninvolute thread retaining hook guide which extends from and under thethread directing guide plate back of the shuttle eye and proximate thebobbin chamber, such hook being cut away to rake forward and to taper,and a thread trapping rim which extends under the sloping forward partof the thread directing guide in w front of the shuttle eye and is cutaway at its front and back whereby the yarn is guided over such guideplate up into the plate having a bottom rim which slopes down and backthrough the threading chamber and at the side slopes down and out, witha thread retaining guide hook which extends from and under the threaddirecting guide plate back of the shuttle eye, said hook guide andsloping side of the guide plate extending in the same direction andproximate the normal unwinding path of the yarn as it unwinds on thefirst pick of the shuttle in a magazine loom.

15. The combination in a shuttle having an eye, a. bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of theshuttle as to extend into the threading chamber, such guide plate havinga bottom rim which slopes down and back through the threading chamberand at the side slopes down and out, with a thread retaining guide hookwhich extends from and under the thread, directing guide plate back ofthe shuttle eye, said hook guide and sloping side of the guide plateextending in the same direction and proximate the normal unwinding pathof the yarn as it unwinds on the first pick of the shuttle in a magazineloom.

16. The combination in a shuttle having an eye, a bobbin chamber, and athreading chamber in continuation thereof which connects with the eye,of a thread directing guide plate so fixed to the top side of theshuttle as-to extend into the threading chamber, such guide platesloping down and out through the threading chamber and having a threadtrapping rim which extends from and under its forward part and a threadretaining hook guide which extends from and under its back part, saidhook guide and sloping side of the guide plate extending in the samedirection and proximate the normal unwinding path of the yarn as itunwinds on the first pick of the shuttle in a magazine loom. y

In testimony whereof I have aflixed my signature.

ISAAC SNOW..

